Disk grinding assembly



March 8, 1955 A, ROWLAND ETAL 2,703,471;

DISK GRINDING ASSEMBLY Filed Feb! 25, less PATENT ATTOFINEYS United States Patent DISK GRINDING ASSEMBLY Alvin Rowland and Philip R. Bice, Aldersyde, Alberta,

Canada Application February 25, 1953, Serial No. 338,818

1 Claim. (Cl. 51-168) Our invention relates to new and useful improvements in disc grinding assemblies, more particularly to disc grinding assemblies which are manipulated and positioned by hand and in which the discs are rotated by an independent means, an object of our invention being to provide a device of the character herewithin described which may be used to sharpen discs in the field thereby eliminating the necessity for bringing the implement containing the discs to a workshop or the like for the grinding to take place.

A further object of our invention is to provide a device of the character herewithin described which is completely universal with regard to positioning of the grinder as well as the angle at which the grinder is offered up to the disc edges.

A still further object of our invention is,to provide a device of the character herewithin described which eliminates the necessity for a source of power for the disc grinder and, if desired, the discs may be rotated by hand or by a simple belt connection to the source of power such as a tractor or the like.

Yet another object of our invention is to provide a device of the character herewithin described which is extremely simple in operation, very economical in construction, and otherwise well suited for the purpose for which it is designed. 1

With the foregoing objects in view, and such other objects and advantages as will become apparent to those skilled in the art to whichthis invention relates as this specification proceeds, our invention consists essentially in the arrangement and construction of parts all as hereinafter more particularly described, reference being had to the accompanying drawings in which:

Figure l is a fragmentary view of a set of discs showing our device in situ.

Figure 2 is a sectional elevation of our device.

Figure 3 is a side elevation of our device per se.

In the drawings like characters of reference indicate corresponding parts in the difierent figures.

There are many disc grinders in operation, the majority of which require that the implement containing the discs be transported to a workshop or the like so that disc grinders of the power-operated type may be used to edge-sharpen the discs. It will be appreciated that this is a considerable disadvantage during the oper ation of implements some distance from the workshop and it is felt that a simple disc grinder is required which may be used in situ as the grinder itself does not require a source of power, the discs being rotated independently either by hand or by the tractor to which the implement is connected.

Proceeding therefore to describe our invention in detail, it will be seen upon reference to the accompanying drawings that we have provided an elongated support and controlling handle 1 which consists of a rod of circular cross-section havinga pointed or conical lower end 2 which may be engaged within the ground thus providing pressure or leverage for the implement.

A grinding wheel assembly collectively designated 2' is situated along the length of this handle and means are provided to position this grinding wheel assembly "ice in any desired position therealong. Reference to Figure 3 in particular will show the construction of the mounting of the assembly and it will be seen that a cylindrical flanged sleeve 3 is slidably engageable upon the handle 1 and may be held in position by means of bolts 4. What we define as the upper end 5 of the sleeve is provided with an annular flange 6, said flange acting as a thrust face as will hereinafter become apparent.

A further flanged sleeve 7 is freely slidable upon handle 1 and acts as a bearing for a grinding wheel 8. This sleeve 7 is also provided with an annular flange 9 at the lower end thereof, said flange being in interfacial relationship with the aforementioned flange 6.

The sleeve 7 is threaded externally as at 10 to receive a nut 11, said nut in conjunction with an annular spacer 12 acting to clamp the grinding wheel 8 against one side of the flange 9. From the foregoing it will be appreciated that the sleeve 7, nut 11, grinding wheel 8 and flange 9 are thus mounted for rotation upon the handle 1, downward movement being prevented by the thrust flange 6.

A cylindrical collar 13 is situated above the nut 11 and upon the handle 1, said collar being held in the desired position by a further clamp bolt 14. An oil tube 15 within the spacer 12 permits lubrication of the interior surface of the sleeve 7 and the bearing surface of the handle 1.

From the foregoing it will be appreciated that the entire grinding assembly may be moved along the length of the handle 1 as desired.

In operation, the set of discs 16 may be rotated by means of belt and pulley assemblies 17 whereupon the conical end 2 of the handle 1 is engaged with the ground in such a position that the grinding surface of the grinding wheel may be offered up to the edge of the disc being sharpened in the desired angular relationship thereto, pressure or leverage of the handle being provided by the aforementioned engagement of the lower end thereof with the ground.

Since various modifications can be made in our invention as hereinabove described, and many apparently widely different embodiments of same made within the spirit and scope of the claim without departing from such spirit and scope, it is intended that all matter contained in the accompanying specification shall be interpreted as illustrative only and not in a limiting sense.

What we claim as our invention is:

A device for sharpening the edges of rotated cultivating discs or the like, comprising in combination an elongated, cylindrical controlling handle, a grinding wheel mounted for rotation upon said handle, and means to adjust selectively the position of said grinding wheel along the length of said handle, said means including a flanged sleeve slidable along said handle, clamping means to secure said sleeve in the desired position therealong, a further flanged sleeve freely rotatable upon said handle, the flanges of said sleeves being in interfacial relationship, said grinding wheel being secured to said last mentioned sleeve, and a collar clampable upon said handle on the side of said grinding whee-l opposite to said first mentioned flanged sleeve.

References Cited in the file of this patent UNITED STATES PATENTS 652,917 Memhardt July 3, 1900 1,123,790 Parlmer Jan. 5, 1915 1,333,112 Hutchins Mar. 9, 1920 1,350,888 Simons Aug. 24, 1920 1,374,012 Hutchins Apr. 5, 1921 2,126,632 Harth Aug. 9, 1938 2,244,586 Venable June 3, 1941 2,517,950 Weirich Aug. 8, 1950 2,541,829 Peddicord Feb. 13, 1951 2,565,916 Frusher Aug. 28,1951 2,626,485 Waldbaner Jan. 27, 1953 

